US 12731878 B2 / Sep 8, 2026

Waveguide filter with electronically controllable variable dielectric material

A waveguide filter may include a waveguide conduit through which an electromagnetic wave propagates. The waveguide filter may include a resonant cavity comprising at least a portion of the waveguide conduit. The waveguide filter may include a variable dielectric material disposed adjacent to the resonant cavity. The waveguide filter may include a tuning electrode to apply an electric field through the variable dielectric material for modification of a permittivity of the variable dielectric material.